Tooth-clamp.



No. 634,73l. Patented Oct. IO, I899.

J. W. IVORY.

TOOTH CLAMP.

(Agplieation filed In. 9, 1899.)

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UNITED STATES PATENT OFFICE,

JAMES w. IVORY, on PHILADELPHIA, PENNSYLVANIA.

TOOTH C LAM P.

SPECIFICATION forming part of Letters PatentNo. 634,731, dated October 10, 1899.

Application filed March 9, 1899.

To all whom it may concern.-

Be it known that I, JAMES W. Ivonv, asub ject of the Queen of Great Britain, residing in the city and county of Philadelphia, State of Pennsylvania, have invented new and useful Improvements in Tooth-Clamps, which im* provements are fully set forth in the following specification and accompanying drawings.

My invention consists of improvementsin a tooth-clamp wherein a jaw is adapted to be pressed against the gum and move or shift the same so as to uncover or expose a marginal cavity or for other purposes and then control said guin as moved or shifted, the novel features being pointed out in the claims that follow the specification.

Figure 1 represents a perspective view of a tooth-clamp embodying my invention. Figs. 2 and 3 represent views. of opposite faces thereof. Fig. at represents a side elevation thereof. Fig. 5 represents a vertical section.

Similar letters of reference indicate correspondingparts in the figures.

Referring to the drawings, A designates an arched frame, having the jaw B at the crown thereof.

C designates the shank of said frame, the same having mounted thereon at the end opposite to the jaw B the threaded socket D, in which is fitted the screw E, the latter being swiveled in the boss F, which is connected with the side of the limb G of the U-shaped elastic support G, whose other limb G carries at its end the. jaw H. 7

It will be noticed that the jaw H has a concave edge, and it is also curved outwardly, so as to present well-defined spurs .or points H for positively and firmly engaging with the neck of the tooth and preventing slipping therefrom.

J designates a yoke or band which encircles the shank G and limbs of the support G and carries the screw K, whose point bears against said shank, it being noticed that thelimb G and shank 0 rest against each other, and said Serial Ho. 768,319. (No model.)

' yoke is adapted to exert pressure on the limbs of the support G, and consequently on the jaw H as seated on the tooth, .the shank 0 ,being, however,movable on the limb G when subjected to the superior power of the screw E, without, however, dislodging the jaw H, it being seen that when the jaws are properly 7 located on the respective labial and palatal or lingual sides of a tooth and the clamp tightened by the screw K the screw E is operated, whereby as the jaw B bears against the gum it moves or shifts the same, and thus uncovers or exposes a marginal cavity that may exist in said tooth and then controls the gum in the position it occupies.

Having thus described my inventiomwhat I claim as new, and desire to secure by Letters Patent, is-

1. A tooth-clamp consisting of jaws, a frame and a resilientsupport respectively carrying said jaws, a band encircling said frame and support, a screw on said band bearing against said frame for compressing said support and a screw on said support engaging said frame,

said frame and support being movably disposed on each other. f

- 2. In a tooth-clamp of the order described, a frame, a resilient support, jaws which are respectively. on said frame and support, a band encircling said frame and one of the limbs of said support, a screw mounted on said band for compressing said support and a screw swiveled on one of the limbs of said support and engaging a threaded socket on said frame, said frame and one of said limbs being movably disposed on each other subjected to the compressing action of the screw on said band, while said support is movably subjected to the action of its operating-screw which latter is of greater power than the screw of the band.

, JAMES W. IVORY. Witnesses:

FRANCIS EVANS, HATTIE IVORY. 

